28985512 has 16 divisors (see below), whose sum is σ = 54632340. Its totient is φ = 14416896.

The previous prime is 28985503. The next prime is 28985519. The reversal of 28985512 is 21558982.

It can be written as a sum of positive squares in 2 ways, for example, as 27311076 + 1674436 = 5226^2 + 1294^2 .

It is a super-3 number, since 3×28985512³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28985519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7843 + ... + 10930.

Almost surely, 2^28985512 is an apocalyptic number.

It is an amenable number.

28985512 is a deficient number, since it is larger than the sum of its proper divisors (25646828).

28985512 is a wasteful number, since it uses less digits than its factorization.

28985512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18972 (or 18968 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The square root of 28985512 is about 5383.8194620548. The cubic root of 28985512 is about 307.1805111425.

The spelling of 28985512 in words is "twenty-eight million, nine hundred eighty-five thousand, five hundred twelve".